/*
 * Copyright (C) 2020 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "SkAndroidCodec.h"
#include "SkBitmap.h"
#include "SkCanvas.h"
#include "SkData.h"
#include "SkSurface.h"

#include <fstream>
#include <iostream>
#include "../includes/memutils.h"

#define SAMPLE_SIZE 6
char enable_selective_overload = ENABLE_NONE;

int decode(sk_sp<SkData> bytes, uint8_t sampleSize) {
    std::unique_ptr < SkAndroidCodec
            > codec(SkAndroidCodec::NewFromData(bytes));
    if (!codec) {
        return EXIT_FAILURE;
    }

    auto size = codec->getSampledDimensions(sampleSize);
    auto info = SkImageInfo::MakeN32Premul(size);
    SkBitmap bm;
    if (!bm.tryAllocPixels(info)) {
        return EXIT_FAILURE;
    }

    SkAndroidCodec::AndroidOptions options;
    options.fSampleSize = sampleSize;

    codec->getAndroidPixels(bm.info(), bm.getPixels(), bm.rowBytes(), &options);
    return EXIT_SUCCESS;
}

int main(int argc, char **argv) {
    if (argc != 2) {
        return EXIT_FAILURE;
    }
    std::ifstream inFile(argv[1]);
    if (!inFile) {
        return EXIT_FAILURE;
    }
    inFile.seekg(0, inFile.end);
    size_t size = inFile.tellg();
    if (size < 1) {
        inFile.close();
        return EXIT_FAILURE;
    }
    inFile.seekg(0, inFile.beg);
    uint8_t *data = (uint8_t *) malloc(size);
    if (!data) {
        return EXIT_FAILURE;
    }
    inFile.read(reinterpret_cast<char *>(data), size);
    auto bytes = SkData::MakeWithoutCopy(data, size);
    bytes = SkData::MakeSubset(bytes.get(), 1, size - 1);
    enable_selective_overload = ENABLE_ALL;
    int ret = decode(bytes, SAMPLE_SIZE);
    enable_selective_overload = ENABLE_NONE;
    inFile.close();
    free(data);
    return ret;
}